Hi Ahmed,


obviously, 20-30 sec. pause is unacceptable.

I suppose check the following:



- disable swapping completely

- check Java version, v8. is desirable (depending on Cassandra version)

- use multiprocessor machine (it allows concurrent GC)



Best regards, Vladimir Yudovin, 

Winguzone - Cloud Cassandra Hosting






---- On Fri, 25 Nov 2016 16:25:15 -0500 S Ahmed <sahmed1...@gmail.com> 
wrote ----




Hello!



>From what I understand java GC pauses are pretty much a fact of life, but you 
>can tune the jvm to reduce the likelihood of the frequency and length of GC 
>pauses.



When using Cassandra, how frequent or long have these pauses known to be?  Even 
with tuning, is it safe to assume they cannot be eliminated?



Would a 20-30 second pause be something out of the ordinary?



Thanks.







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